| 13 Products | Oct 2025 | Oct 2026 | Change |
| John West Mackerel Fillets in Sweet Chilli (115g) | £1.95 | £1.95 | £0.00 No change |
| | £1.95 | £1.95 | £0.00 No change |
| Waitrose Ltd Essential Hot Smoked Scottish Mackerel Fillets (0.3kg) | £4.20 | £4.20 | £0.00 No change |
| | £4.20 | £4.20 | £0.00 No change |
| Waitrose Ltd Essential Mackerel Fillets in Olive Oil (125g) | £1.25 | £1.80 | + £0.55 44% increase |
| | £1.25 | £1.80 | + £0.55 44% increase |
| John West King Oscar Mackerel Fillets in Olive Oil (115g) | £1.25 | £1.25 | £0.00 No change |
| | £1.25 | £1.25 | £0.00 No change |
| John West Mackerel Fillets in Sunflower Oil () | £2.13 | £3.50 | + £1.37 64.3% increase |
| | £2.13 | £3.50 | + £1.37 64.3% increase |
| Graal Mackerel Fillets in Tomato Sauce (170g) | £1.35 | £9.25 | + £7.90 585.2% increase |
| | £1.35 | £9.25 | + £7.90 585.2% increase |
| John West King Oscar Mackerel Fillets in Lemon Oil Drained (115g) | £2.00 | £2.00 | £0.00 No change |
| | £2.00 | £2.00 | £0.00 No change |
| Waitrose Ltd Essential Mackerel in Spicy Tomato Sauce (125g) | £1.05 | £1.55 | + £0.50 47.6% increase |
| | £1.05 | £1.55 | + £0.50 47.6% increase |
| Waitrose Ltd Essential Mackerel Fillets in Tomato Sauce () | £1.05 | £1.55 | + £0.50 47.6% increase |
| | £1.05 | £1.55 | + £0.50 47.6% increase |
| John West Mackerel Fillets in Olive Oil (80g) | £1.77 | £1.70 | - £0.07 -4% decrease |
| | £1.77 | £1.70 | - £0.07 -4% decrease |
